CN110485486A - A kind of pile foundation static load test detection structure and its detection method - Google Patents
A kind of pile foundation static load test detection structure and its detection method Download PDFInfo
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- CN110485486A CN110485486A CN201910876551.7A CN201910876551A CN110485486A CN 110485486 A CN110485486 A CN 110485486A CN 201910876551 A CN201910876551 A CN 201910876551A CN 110485486 A CN110485486 A CN 110485486A
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- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 230000003068 static effect Effects 0.000 title claims abstract description 26
- 238000004062 sedimentation Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000011068 loading method Methods 0.000 claims description 8
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The present invention relates to a kind of pile foundation static load test detection structures, it is related to the technical field of pile measurement, including counterweight, platform that counterweight bottom is set, girder of the mesa base right above pile foundation, the jack being arranged between girder and pile foundation is set and the dial gauge in pile foundation for detection of pier foundation sedimentation is set, further include that mesa base is set in the buttress of pile foundation two sides and is separately positioned on buttress bottom and is wider than the bearing platform of buttress, the attachment device being linked as with platform together is provided with bearing platform and buttress between the bearing platform and platform.The present invention with high security, save the cost and the advantages of improve work efficiency.
Description
Technical field
The present invention relates to the technical field of pile measurement, more particularly, to a kind of pile foundation static load test detection structure and its
Detection method.
Background technique
Pile foundation static load detection test is in engineering to a technology of bearing capacity of pile foundation detection.Determining single pile
In terms of ultimate bearing capacity, it is presently the most accurate, the reliable method of inspection, as determine certain dynamic load method of inspection whether at
It is ripe, using the comparison error size of Static Load Test Results as foundation.Therefore, every kind of Base foundation design processing specification is all single pile
Static test is included in top priority.
Currently, pile foundation static load detection test include be arranged at intervals on ground buttress, be arranged on buttress platform,
The concrete precast block that is arranged on platform, the girder that mesa base is set and is located at right above pile foundation, setting girder with
Hydraulic jack between pile foundation and the dial gauge in pile foundation for the sedimentation of detection of pier foundation stress is set, the platform includes
More I-steel being disposed side by side on buttress, the concrete precast block and buttress are that concrete precast block preloading is formed.Examination
When testing, the concrete precast block on the platform and platform on top is pressed by hydraulic jack, so that effect counter-force be applied
On detection of pier foundation, to measure the settling amount that detection of pier foundation occurs in stress by dial gauge.
Prior art among the above has the following deficiencies: since buttress acts only as the work of supporting leg during the test
With, for big loading test platform, the area of platform is larger, and general length and width is in 6-8m, and the height of buttress is in 1.5-2m, and two
The occupied concrete prefabricated number of blocks of buttress is also very big, in test with concrete prefabricated block specifications be generally 2m*1m*
0.5m, every piece of weight about 2.5t, generally 40-50 block, weight is in 100-130t.When test, it will be mixed with transport wagon
Solidifying soil prefabricated section is conveyed into come outside test site, and then code puts together composition buttress, and transportation cost is high, increases detection examination
The cost tested and duration.
Summary of the invention
The first purpose of the invention is to provide a kind of pile foundation static load test detection structures, with high security, save
Cost and the advantages of improve work efficiency.
Foregoing invention purpose of the invention has the technical scheme that
A kind of pile foundation static load test detection structure, including counterweight, platform that counterweight bottom is set, setting mesa base in
Girder right above pile foundation, the jack being arranged between girder and pile foundation and being arranged in pile foundation is settled for detection of pier foundation
Dial gauge, further include that mesa base is set in the buttress of pile foundation two sides and is separately positioned on buttress bottom and is wider than buttress
Bearing platform is provided with bearing platform and buttress the attachment device being linked as with platform together between the bearing platform and platform.
By using above-mentioned technical proposal, platform is connect with bearing platform by attachment device, it can be by the weight of buttress
It acts on platform, in test, buttress is not only able to play the role of support platform, and the weight of buttress itself also can
It is applied on platform, serves as a part of counterweight, the counterweight counter-force needed for suitably reducing above platform in this way reduces test
The quantity of required concrete precast block reduces hoisting transportation cost, also saves field test expense, reduces the test duration,
It improves work efficiency, meanwhile, by reducing the counterweight on platform, reduce the preloading height of concrete precast block, certain journey
The stability and security performance of test platform are also increased on degree.
The present invention is further arranged to: the attachment device is arranged in pairs, and is separately positioned on the two sides of buttress, and along holding
The length direction interval of weight platform is uniformly arranged multipair.
By using above-mentioned technical proposal, attachment device is arranged in pairs in the two sides of buttress, it can be smoothly by buttress
It is connected and fixed by bearing platform and platform, stability is good, highly-safe.
The present invention is further arranged to: the platform includes more I-steel being disposed side by side on buttress.
By using above-mentioned technical proposal, I-steel is readily transported, and bearing capacity is strong, and stability is high.
The present invention is further arranged to: the attachment device includes connecting rod and cutting ferrule, described connecting rod one end and load-bearing
Platform connection, the other end are connect with cutting ferrule, and the cutting ferrule is set on I-steel.
By using above-mentioned technical proposal, be set on I-steel by cutting ferrule, increase the load-bearing capacity of attachment device with
Stability, it is easy to connect, it is highly-safe.
The present invention is further arranged to: the cutting ferrule includes the load-bearing set that cross section is in rectangle, outside load-bearing set bottom
U-shaped buckle is convexed into, the buckle lower rotation is provided with hanging ring, and the connecting rod is installed with grab close to one end of hanging ring,
The grab hook is located on hanging ring.
By using above-mentioned technical proposal, inlay card is covered on the bottom plate of I-steel by load-bearing, is mounted and dismounted more square
Just, while by connecting rod and cutting ferrule pass through the connection type of grab and hanging ring, it is simpler, convenient.
The present invention is further arranged to: the connecting rod includes connecting rod, sunpender and chain, and connecting rod one end setting exists
On bearing platform, the other end and chain are rotatablely connected, the fixed threaded rod in the one end of the chain far from connecting rod, are opened up in the sunpender
There is the threaded hole being adapted to threaded rod, the threaded rod is screwed in threaded hole, and the grab is installed in sunpender far from chain
One end.
By using above-mentioned technical proposal, connecting rod is connected by chain with sunpender, is on the one hand located at and hangs convenient for grab hook
On ring, connecting rod and sunpender on the other hand can be made to be in tension, easy for installation, operation letter by adjusting the length of threaded rod
It is single.
The present invention is further arranged to: the position that the bearing platform is correspondingly connected with bar offers card slot, the card slot with hold
The side wall connection of weight platform, the connecting rod is installed with expansion block by one end that card slot passes through bearing platform and passes through bearing platform, described
It is provided with external screw thread on connecting rod, the fastening nut that can be pressed at the top of bearing platform is screwed on the connecting rod.
By using above-mentioned technical proposal, connecting rod is connect with bearing platform by way of clamping, when installation does not need benefit
It is easy to operate with tool, fast.
The present invention is further arranged to: the bearing platform bottom is fixedly installed limited block in card slot two sides respectively, described
One end of card slot opening is arranged in limited block.
By using above-mentioned technical proposal, limited block can stop expansion block to prevent so that connecting rod is limited in card slot
Connecting rod falls off card slot, and stability is more preferable.
The present invention is further arranged to: the load-bearing set offers screw hole far from buckle on one side, and the load-bearing is placed on out
Nut is held out against if being installed at screw hole, the screw hole and nut inward turning is held out against and is screwed with puller bolt.
By using above-mentioned technical proposal, puller bolt is screwed, puller bolt can be pressed on the bottom plate of I-steel,
Cutting ferrule is fixed on I-steel, stability when loading test is increased.
A second object of the present invention is to provide a kind of pile foundation static load test detection methods, comprising the following steps:
Two bearing platforms are placed on pile foundation two sides by S1, smooth pile foundation surrounding ground；
S2, it determines height between platform and pile foundation, concrete precast block is stacked on bearing platform and forms buttress；
S3, two cushion blocks are respectively set perpendicular to the two sides in buttress direction in pile foundation, by main beam supporting on two cushion blocks, girder
Right above pile foundation, and make the top surface of girder not higher than the top surface of buttress；
S4, it uniformly places I-steel in the head clearances of two buttresses and forms platform, and mention cutting ferrule when placing I-steel
Preceding inlay card by expansion block one end inlay card of connecting rod in card slot, and screws fastening nut for link lever locking, makes card on I-steel
Hook hook is located on hanging ring, then rotates threaded rod, chain is made to be in tension；
S5, it concrete precast block is overlayed forms counterweight on platform, the total weight of counterweight and buttress is held not less than the pile foundation limit
Carry 1.2 times of power；
S6, in the parallel two benchmark framves of placement in the two sides of pile foundation, be sequentially placed lower bolster, jack from top to bottom in pile foundation
And upper padding plate, upper padding plate are connected to bottom plane of main girder, and the pedestal of dial gauge is fixed on benchmark frame, the probe of dial gauge is connected to
The bottom surface of lower bolster；
S7, the ultimate load hierarchical loading according to pile foundation, the size of every grade of load is the 1/10-1/15 of ultimate load, to very heavy
Top is pressurizeed, and is jacked up jack by girder and is pressed against mesa base, is then classified and presses to pile foundation, until load
Until the ultimate load of pile foundation；
After S8, pile foundation static load detection are completed, classification unloads pile foundation, finally successively removes counterweight from top to bottom, puts down
Platform and buttress.
By using above-mentioned technical proposal, the present invention is tested using concrete precast block preloading, and both by buttress
It can be used as platform, and counterweight counter-force can be used as, be not only applicable in big load accumulated loading test, and be applicable in small load preloading
Test, strong applicability are highly-safe；And buttress is connect with platform by attachment device, installation and removal are convenient, while not
The setting to upper layer counterweight is influenced, stability is strong, highly-safe.
In conclusion advantageous effects of the invention are as follows:
1. being connect platform with bearing platform by attachment device, the weight of buttress can be acted on platform, in test, branch
Pier is not only able to play the role of support platform, and the weight of buttress itself can be also applied on platform, serve as counterweight
A part, with high security, save the cost and the advantages of improve work efficiency；
2. being set on I-steel by cutting ferrule, increase the load-bearing capacity and stability of attachment device, easy to connect, safety
It is high；
3. covering inlay card on the bottom plate of I-steel by load-bearing, installation and removal are more convenient, while connecting rod and cutting ferrule being led to
The connection type of grab and hanging ring is crossed, it is simpler, convenient.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of the prominent attachment device of the present invention；
Fig. 3 is the partial enlargement diagram of part A in Fig. 2；
Fig. 4 is the partial enlargement diagram of part B in Fig. 2.
In figure, 1, bearing platform；11, card slot；12, limited block；2, buttress；3, platform；4, counterweight；5, girder；51, underlay
Plate；52, upper padding plate；6, jack；7, dial gauge；8, benchmark frame；9, attachment device；91, connecting rod；911, connecting rod；912, it hangs
Bar；913, chain；914, threaded rod；915, expand block；916, fastening nut；917, bulb；918, swivel becket；92, cutting ferrule；
921, load-bearing set；922, it buckles；923, hanging ring；93, grab.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
Referring to Fig.1, be a kind of pile foundation static load test detection structure disclosed by the invention, including bearing platform 1, buttress 2, platform 3,
Counterweight 4, girder 5, jack 6 and dial gauge 7, bearing platform 1 are two, and two bearing platforms 1 are parallel to each other, and are separately positioned on stake
The two sides of base.Buttress 2 is provided on bearing platform 1, buttress 2 is that muti-piece concrete precast block is stacked together to be formed, buttress 2
Height is 1.5-2.0m, provides enough construction spaces for later period pile foundation static load test.Platform is placed on two buttresses 2
3, platform 3 includes the evenly spaced more I-steel that 2 top surface of buttress is arranged in, and i-beam frame is located on two buttresses 2.Platform
It being placed on 3 for providing the counterweight 4 of counter-force to pile foundation, counterweight 4 is the concrete precast block composition that muti-piece is stacked together,
Middle counterweight 4 and the total weight of buttress 2 are not less than 1.2 times of limit load of pile foundation, concrete prefabricated used in counterweight 4 and buttress 2
Block specifications 2m*1m*0.5m, and when concrete precast block stacks, upper layer and lower layer concrete precast block transverse and longitudinal intersection is put, and is increased
The stability for the concrete precast block being stacked together.
It is provided with girder 5 right above pile foundation in 3 bottom of platform, is successively set from top to bottom between pile foundation and girder 5
Lower bolster 51, jack 6 and upper padding plate 52 are set, lower bolster 51 is placed on pile foundation top surface, and upper padding plate 52 is connected to 5 bottom surface of girder,
Jack 6 allows to apply 1.2 times that pressure is not less than limit load of pile foundation.
The two sides of pile foundation are respectively set there are two the benchmark frame 8 being parallel to each other, and the pedestal of dial gauge 7 is fixed on benchmark frame 8
On, the probe of dial gauge 7 is connected to the bottom surface of lower bolster 51.Further, for the ease of the reading of reading jack and dial gauge
Number, pressure sensor is arranged on jack, displacement sensor is arranged on dial gauge, passes through pressure sensor and displacement sensing
Device can read the top power of jack and the variation of dial gauge displacement respectively.
The attachment device 9 for being linked together bearing platform 1 and buttress 2 and platform 3 is provided between bearing platform 1 and platform 3, even
Connection device 9 is arranged in pairs, and each pair of attachment device 9 is separately positioned on the two sides of buttress 2, and along between the length direction of bearing platform 1
It is multipair every being uniformly arranged.It is not only able to increase the stability connected between buttress 2 and platform 3, and is filled by multipair connection
Setting 9 can prevent 9 self-strength of attachment device from not enough being drawn bad the weight equal part of buttress 2.
Referring to Fig. 2, attachment device 9 includes connecting rod 91 and cutting ferrule 92, and 91 one end of connecting rod is connect with bearing platform 1, another
End is connect with cutting ferrule 92, and cutting ferrule 92 is set on I-steel.
Referring to Fig. 3, cutting ferrule 92 includes load-bearing set 921 of the cross section in rectangle, and load-bearing covers 921 bottom evaginations and forms U-shaped card
Button 922,922 lower rotations of buckle are provided with hanging ring 923, specifically, 922 bottoms of buckle offer perforation, are inserted in perforation
Inserted link, inserted link in the two sides of perforation be installed with respectively can not by the stop collar of perforation, the one end of inserted link far from cutting ferrule 92 with hang
Ring 923 consolidates.Connecting rod 91 is fixedly installed grab 93 close to one end of hanging ring 923, and the hook of grab 93 is located on hanging ring 923.
Referring to Fig. 4, connecting rod 91 includes connecting rod 911, sunpender 912 and chain 913, and one end of connecting rod 911 is arranged in load-bearing
On platform 1, the other end and chain 913 are rotatablely connected, and are fixedly connected with threaded rod 914 far from one end of connecting rod 911 in chain 913,
The threaded hole being adapted to threaded rod 914 is offered in sunpender 912, threaded rod 914 is screwed in threaded hole, and grab 93, which is installed in, to be hung
The one end of bar 912 far from chain 913.Specifically, offering card slot 11, card slot 11 in the position that bearing platform 1 is correspondingly connected with bar 91
It is connected to the side wall of bearing platform 1, connecting rod 911 is installed with expansion by one end that card slot 11 passes through bearing platform 1 and passes through bearing platform 1
Block 915, external screw thread can not be provided with by card slot 11 on connecting rod 911 by expanding block 915, and preferably external screw thread is arranged in connecting rod 911
Lower part, the fastening nut 916 that can be pressed on 1 top of bearing platform is screwed on connecting rod 911.The upper end fixation of connecting rod 911 is set
It is equipped with fixed link, fixed link is provided with bulb 917 far from one end of connecting rod 911, swivel becket 918 is arranged in fixed link, turns
Rotating ring 918 and chain 913 consolidate.
Referring to Fig. 4, connecting rod 911 is detached from card slot 11 in order to prevent, and in 1 bottom of bearing platform, in 11 two sides of card slot, fixation is set respectively
It is equipped with limited block 12, one end of the opening of card slot 11 is arranged in limited block 12, and limited block 12 can stop to expand block 915, thus will
Connecting rod 911 is limited in card slot 11, prevents connecting rod 911 from falling off card slot 11, stability is more preferable
Embodiment two:
A kind of pile foundation static load test detection method, comprising the following steps:
S1, smooth pile foundation surrounding ground, and be compacted, laitance at the top of pile foundation is removed, it is flat by being made at the top of pile foundation, by two bearing platforms 1
Pile foundation two sides are placed on, length of the bearing platform 1 apart from pile foundation is the half of 3 width of platform.
S2, height between platform 3 and pile foundation is determined, generally 1.5-2.0m is provided enough for later period pile measurement
Construction space.Concrete precast block is stacked on bearing platform 1 and forms buttress 2, and the height and platform 3 of buttress 2 are between pile foundation
Highly identical, upper layer and lower layer concrete precast block staggeredly overlaps together, and can make the concrete precast block phase being stacked
Mutually pressing is formed whole, increases the stability of buttress 2.
S3, two cushion blocks are respectively set perpendicular to the two sides in 2 direction of buttress in pile foundation, cushion block is stacked by concrete precast block
It is formed, girder 5 is erected on two cushion blocks, girder 5 is located at right above pile foundation, and makes the top surface of girder 5 not higher than buttress 2
Top surface.
S4, two buttresses 2 head clearance uniformly place I-steel formed platform 3, I-steel spacing 20-40cm, and
And cutting ferrule 92 is shifted to an earlier date into inlay card on I-steel when placing I-steel, two cutting ferrules 92 are located at the two sides of buttress 2, will even
915 one end inlay card of expansion block of bar 911 screws fastening nut 916 and connecting rod 911 is locked on bearing platform 1 in card slot 11,
It is located at the hook of grab 93 on hanging ring 923, then rotates threaded rod 914, chain 913 is made to be in tension.
S5, concrete precast block is stacked into formation counterweight 4 on platen 3, upper layer and lower layer concrete precast block staggeredly laminates
Together, the concrete precast block being stacked can be made to be laminated to form entirety, increases the stability of counterweight 4, counterweight 4
It is not less than 1.2 times of Ultimate Bearing Capacity with the total weight of buttress 2.
S6, in the parallel two benchmark framves 8 of placement in the two sides of pile foundation, be sequentially placed lower bolster from top to bottom in pile foundation
51, jack 6 and upper padding plate 52, upper padding plate 52 are connected to 5 bottom surface of girder, the pedestal of dial gauge 7 are fixed on benchmark frame 8,
The probe of dial gauge 7 is connected to the bottom surface of lower bolster 51, and jack 6 is placed on pile foundation center, and jack 6 allows to apply
Pressure is not less than 1.2 times of limit load of pile foundation.
S7, the ultimate load hierarchical loading according to pile foundation, the size of every grade of load are the 1/10-1/15 of ultimate load, are adopted
With maintained load test (ML-test) at a slow speed, i.e. multistage loadings, every grade of load reaches relatively stable rear plus next stage load, until reaching pile foundation pole
Until limit load carries, then load shedding to zero.Under every grade of load action, when the settling amount of stake is less than 0.1mm in per hour,
Next stage load can be added.
It pressurizes to jack 6, jack up jack 6 by girder 5 and presses against 3 bottom of platform, be then classified to stake
Base presses, and the first order can be by 2 times of classification load loadings；After every grade of load, surveys and read once every 5,10,15,15,15min
The data of dial gauge 7 (or displacement sensor), it is later primary every 30min reading, until being loaded onto the maximum of test requirements document
Until load or the ultimate load of pile foundation.
When there are following situations, load is terminated:
1, under certain grade of load action, the settling amount of stake is five times of settling amount under previous stage load action；
2, under certain grade of load action, the settling amount of pile foundation is greater than twice of settling amount under previous stage load action, and through for 24 hours not yet
Reach relatively stable；
3, pile foundation is destroyed；
4, the maximum load value of design requirement is had reached.
After S8, pile foundation static load detection are completed, classification unloads pile foundation, and every grade of unloading value is the two of loaded value
Times, it is one hour that every grade of unloading, which is held time, it is surveyed after every grade of unloading every 15min and reads a residual settlement, after reading twice, every
30min is read once again, all after unloading, is read again once every 3-4h.
After the experiment has been completed, dial gauge 7 and pressure sensor are removed first, one by one by the concrete precast block of counterweight 4
It hangs.Then unscrew threaded rod 914, make grab 93 be detached from hanging ring 923, release platform 3 and buttress 2 connection, dismounting platform 3,
Girder 5, jack 6.The corresponding concrete precast block of buttress 2 is hung one by one, connecting rod 911 is then removed from bearing platform 1 is
It can.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of pile foundation static load test detection structure, platform (3), setting including counterweight (4), setting in counterweight (4) bottom
Jack (6) and setting of the girder (5), setting right above pile foundation between girder (5) and pile foundation in platform (3) bottom
Dial gauge (7) in pile foundation for detection of pier foundation sedimentation, it is characterised in that: further include being arranged in platform (3) bottom in pile foundation
The buttress (2) of two sides and be separately positioned on buttress (2) bottom and be wider than the bearing platform (1) of buttress (2), the bearing platform (1) and
It is provided between platform (3) and bearing platform (1) and buttress (2) and platform (3) is linked as attachment device (9) together.
2. a kind of pile foundation static load test detection structure according to claim 1, it is characterised in that: the attachment device
(9) it is arranged in pairs, is separately positioned on the two sides of buttress (2), and be uniformly arranged along the length direction interval of bearing platform (1) more
It is right.
3. a kind of pile foundation static load test detection structure according to claim 2, it is characterised in that: platform (3) packet
Include more I-steel being disposed side by side on buttress (2).
4. a kind of pile foundation static load test detection structure according to claim 3, it is characterised in that: the attachment device
It (9) include connecting rod (91) and cutting ferrule (92), described connecting rod (91) one end is connect with bearing platform (1), the other end and cutting ferrule
(92) it connects, the cutting ferrule (92) is set on I-steel.
5. a kind of pile foundation static load test detection structure according to claim 4, it is characterised in that: cutting ferrule (92) packet
The load-bearing set (921) that cross section is rectangle is included, load-bearing set (921) the bottom evagination forms U-shaped buckle (922), the buckle
(922) lower rotation is provided with hanging ring (923), and the connecting rod (91) is installed with grab (93) close to the one end of hanging ring (923),
The grab (93) hooks and is located on hanging ring (923).
6. a kind of pile foundation static load test detection structure according to claim 5, it is characterised in that: the connecting rod (91)
Including connecting rod (911), sunpender (912) and chain (913), described connecting rod (911) one end is arranged on bearing platform (1), another
End is rotatablely connected with chain (913), one end fixed threaded rod (914) of the chain (913) far from connecting rod (911), described to hang
The threaded hole being adapted to threaded rod (914) is offered in bar (912), the threaded rod (914) is screwed in threaded hole, the card
Hook (93) is installed in the one end of sunpender (912) far from chain (913).
7. a kind of pile foundation static load test detection structure according to claim 6, it is characterised in that: the bearing platform (1)
The position for being correspondingly connected with bar (91) offers card slot (11), and the card slot (11) is connected to the side wall of bearing platform (1), the connecting rod
(911) it is installed with by one end that card slot (11) pass through bearing platform (1) and pass through bearing platform (1) and expands block (915), the connecting rod
(911) it is provided with external screw thread on, screws the fastening nut that can be pressed at the top of bearing platform (1) on the connecting rod (911)
(916)。
8. a kind of pile foundation static load test detection structure according to claim 6, it is characterised in that: the bearing platform (1)
Bottom is fixedly installed limited block (12) respectively in card slot (11) two sides, what limited block (12) setting was open in card slot (11)
One end.
9. a kind of pile foundation static load test detection method, which comprises the following steps:
Two bearing platforms (1) are placed on pile foundation two sides by S1, smooth pile foundation surrounding ground；
S2, it determines height between platform (3) and pile foundation, concrete precast block is stacked on bearing platform (1) and forms buttress (2)；
S3, two cushion blocks are respectively set perpendicular to the two sides in buttress (2) direction in pile foundation, girder (5) is erected at two cushion blocks
On, girder (5) is located at right above pile foundation, and makes the top surface of girder (5) not higher than the top surface of buttress (2)；
S4, two buttresses (2) head clearance uniformly place I-steel formed platform (3), and when placing I-steel general
Cutting ferrule (92) shifts to an earlier date inlay card on I-steel, by expansion block (915) one end inlay card of connecting rod (911) in card slot (11), and revolves
Tight fastening nut (916) locks connecting rod (911), hooks grab (93) and is located on hanging ring (923), then rotates threaded rod
(914), chain (913) is made to be in tension；
S5, it concrete precast block is overlayed is formed on platform (3) counterweight (4), counterweight (4) is not low with the total weight of buttress (2)
In 1.2 times of Ultimate Bearing Capacity；
S6, in the parallel two benchmark framves (8) of placement in the two sides of pile foundation, be sequentially placed lower bolster from top to bottom in pile foundation
(51), jack (6) and upper padding plate (52), upper padding plate (52) are connected to girder (5) bottom surface, the pedestal of dial gauge (7) are fixed
On benchmark frame (8), the probe of dial gauge (7) is connected to the bottom surface of lower bolster (51)；
S7, the ultimate load hierarchical loading according to pile foundation, the size of every grade of load is the 1/10-1/15 of ultimate load, to very heavy
Top (6) is pressurizeed, and is jacked up jack (6) by girder (5) and is pressed against platform (3) bottom, is then classified and is carried out to pile foundation
Pressure, until being loaded onto the ultimate load of pile foundation；
S8, pile foundation static load detection complete after, classification pile foundation is unloaded, finally from top to bottom successively remove counterweight (4),
Platform (3) and buttress (2).
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| CN111622275A (en) * | 2020-05-26 | 2020-09-04 | 武汉弘泰建筑工程质量检测有限公司 | Concrete pile foundation detection method |
| CN112482452A (en) * | 2020-12-07 | 2021-03-12 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN113550344A (en) * | 2021-07-24 | 2021-10-26 | 中铁广州工程局集团深圳工程有限公司 | Integrated fire-fighting water pump house structure and construction method |
| CN113638455A (en) * | 2021-09-24 | 2021-11-12 | 广西力宇建设工程检测有限公司 | Foundation pile static load test system and test method |
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| CN207829029U (en) * | 2017-04-19 | 2018-09-07 | 王建宏 | A kind of preloading formula static load of pile foundation experimental provision |
| CN208748716U (en) * | 2018-09-07 | 2019-04-16 | 河北华宇工程检测有限公司 | A kind of counter weight type dead load test on pile foundation buttress device |
| CN210621787U (en) * | 2019-09-17 | 2020-05-26 | 中兵勘察设计研究院有限公司 | Pile foundation static load test detection structure |
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| CN208748716U (en) * | 2018-09-07 | 2019-04-16 | 河北华宇工程检测有限公司 | A kind of counter weight type dead load test on pile foundation buttress device |
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| CN111622275A (en) * | 2020-05-26 | 2020-09-04 | 武汉弘泰建筑工程质量检测有限公司 | Concrete pile foundation detection method |
| CN112482452A (en) * | 2020-12-07 | 2021-03-12 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN112482452B (en) * | 2020-12-07 | 2022-02-18 | 福建永信德工程检测有限公司 | Pile foundation static load automatic detection device and detection method |
| CN113550344A (en) * | 2021-07-24 | 2021-10-26 | 中铁广州工程局集团深圳工程有限公司 | Integrated fire-fighting water pump house structure and construction method |
| CN113638455A (en) * | 2021-09-24 | 2021-11-12 | 广西力宇建设工程检测有限公司 | Foundation pile static load test system and test method |
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